Which of the following strategies would be an effective and cost-effective (i.e. relatively cheap) method for improving road safety, with no major disbenefits?
A. Reduce the amount people use their cars, as road deaths dropped dramatically during lockdown.
B. Require all learner drivers to complete mandatory skid training.
C. Paint additional road markings that make the road appear narrower, so people will instinctively slow down.
D. Implement a social media campaign advising everyone to driver slower and pay more attention while driving.
Answer: C